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Date:2011-11-01 10:44:54
General more common bearing failure forms of the pitting have fatigue, plastic deformation, wear and plywood.
(1) the pitting fatigue
For general use for a long time of rolling bearing, rolling body and inner and outer in load, the surface is a great circulation between contact stress, so that the work of the bearing surface (rolling elements and inside, ring groove surface) happened pitting corrosion fatigue (hemp dot), serious as metal surface piece flake, pits formation, that they lose the ability to work normally.
(2) plastic deformation
For extremely low speed or slow swing of the rolling bearing under the working conditions, general wont appear the pitting fatigue. But when the load is very big, rolling body and groove in the local stress contact more than material of the yield of limit, can make the bearing surface of permanent work happens plastic deformation, to make the bearing cant continue to use. When hard particles from the outside of the tao and roll into the bearings between roller, hard particles will in the groove surface to form creasing, also is a kind of plastic deformation.
(3) wear and plywood
Bearing bad lubrication and sealing, it will cause bearing the friction surface wear. High speed and cooling bad happen hood.